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3.740 inches

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16y ago

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Is a 305 block the same as a 350 block?

NO the bore / cylinder size is different. Pluse the stroke


What can you bore s 305 to?

any Chevy 305 block can be safely bored .060 over. if you have a good block, with thicker cylinder walls, it might be .080 borable.


Will 305 heads make more horsepower on a 350 1990ish motor with carb conversion?

No. 305's have small valves due to the 305's small bore. Large valve heads can't be used on the 305 because the valves will hit the cylinder block. 350 heads breathe MUCH better than 305 heads. Stick with the 350 heads.


Do the 305 vortec and 350 vortec have the same heads?

No. The 350 has bigger valves. While you CAN put the 305 heads on the 350, (I can't imagine why you would actually want to) you can NOT put the 350 heads on the 305. Because of the 305's small bore, the valves on the 350 heads will hit the cylinder block.


What is the stock cylinder size on a Chevy sb 305?

The bore and stroke is---3.740 bore and 3.480 stroke. STOCK 305


How can you tell if a small block Chevy is a 350 and not a 305?

Check the head casting numbers and reference a book that details what casting belongs to what. The best way to tell is measure the cylinder bore. Chevy 350 has a 4.00 inch bore, whereas the 305 has a 3.736 inch bore. You can't tell from the crank, they have the same crank with the same 3.480 inch stroke.


Are Chevy 305 and 350 block the same?

NO The bore and stroke is different.


Can a Chevy 305 be turned into a 327?

No. You would need to bore the block to 4 inches, which is too much for a 305.


Block casting numbers 355909 what size motor?

It is a Chevy 305 or 262 cubic inch. You could tell by measuring the bore of the cylinder. A 3.671 bore is a 262 and a 3.736 bore is a 305. They were made from 1975 to 1996 and they are all 2 bolt main seal engines regardless of year. The only year the 262 was made was 1975 so if your date code gives you anything other than 1975 then it would be a 305.


Will a 305 motor with 350 aluminum heads work?

no, small bore ,big combustion chamber you want big bore small chambers


What is the difference between 305 and 350?

Subtract 305 from 350 and that will give you the difference (or interval) between the two numbers:- the answer is 45. However, if you mean what is the difference between a Chevy 305 and a Chevy 350, then it is the difference between the engine bore (the cylinder) sizes. The 305 bore is 3.740 inches. And the 350 bore is 4.000 inches, giving the Chevy 350 20HP more then the Chevy 305.


Will Chevy 305 heads fit a Chevy 350?

You will need to have the heads for the 305 bored out to the same size as the 350. I disagree: you can use the 305 heads on the 350 block but you will increase compression as the 305 heads have a smaller combustion chamber. The critical dimension is valve clearance. If compression ratio is a critical consideration, different pistons may be available which will bring the combustion chamber back to size. the 305 is from the 3.671 inch bore family. The 350 is from the 4.00 inch bore family. All small block heads have the same bolt pattern.